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MySQL load NULL values from CSV data
...one, two, three, @vfour, five)
SET four = NULLIF(@vfour,'')
;
If they're all possibly empty, then you'd read them all into variables and have multiple SET statements, like this:
LOAD DATA INFILE '/tmp/testdata.txt'
INTO TABLE moo
FIELDS TERMINATED BY ","
LINES TERMINATED BY "\n"
(@vone, @vtwo, @v...
What's the fundamental difference between MFC and ATL?
... long answer:
MFC was built in the early 90s to try out this new language called C++ and apply it to Windows. It made Office like features available to the development community when the OS didn't have them yet.
[Edit embellishment: I did not work at Microsoft, so I don't know if Office was ever ...
Turn off textarea resizing
...
Try this CSS to disable resizing
The CSS to disable resizing for all textareas looks like this:
textarea {
resize: none;
}
You could instead just assign it to a single textarea by name (where the textarea HTML is ):
textarea[name=foo] {
resize: none;
}
Or by id (where the tex...
How to check if variable's type matches Type stored in a variable
...
The other answers all contain significant omissions.
The is operator does not check if the runtime type of the operand is exactly the given type; rather, it checks to see if the runtime type is compatible with the given type:
class Animal {}...
Allow anything through CORS Policy
How can I disable cors? For some reason I wild carded the allowed origins and headers yet my ajax requests still complain that the origin was not allowed by my CORS policy....
...
What's the equivalent of use-commit-times for git?
...ion of "wrong" you are talking about.
It's WRONG.
It's STUPID.
And it's totally INFEASIBLE to implement.
(Note: small improvement: after a checkout, timestamps of up-to-date files are no longer modified (Git 2.2.2+, January 2015): "git checkout - how can I maintain timestamps when switching branch...
How to vertically align into the center of the content of a div with defined width/height?
What would be the correct method to vertically center any content in a defined width/height div .
4 Answers
...
Modern way to filter STL container?
...and if it returns true it copies the value to bar.
The std::back_inserter allows us to actually insert new elements at the end of bar (using push_back()) with an iterator without having to resize it to the required size first.
...
Why is document.body null in my javascript?
...body hasn't been defined at this point yet. In general, you want to create all elements before you execute javascript that uses these elements. In this case you have some javascript in the head section that uses body. Not cool.
You want to wrap this code in a window.onload handler or place it after...
Integer.toString(int i) vs String.valueOf(int i)
...
String.valueOf(int) just calls Integer.toString(i) directly. So best to call Integer.toString(int).
– djchapm
May 21 '19 at 16:21
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